18193825

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{89}}^1$

素因数の和:166

約数の個数: 48

約数和(自身を含む): 26717040

約数和(自身を除く): 8523215

約数列:

[1, 5, 13, 17, 25, 37, 65, 85, 89, 185, 221, 325, 425, 445, 481, 629, 925, 1105, 1157, 1513, 2225, 2405, 3145, 3293, 5525, 5785, 7565, 8177, 12025, 15725, 16465, 19669, 28925, 37825, 40885, 42809, 55981, 82325, 98345, 204425, 214045, 279905, 491725, 727753, 1070225, 1399525, 3638765, 18193825]

約数ペア:

[(1, 18193825), (5, 3638765), (13, 1399525), (17, 1070225), (25, 727753), (37, 491725), (65, 279905), (85, 214045), (89, 204425), (185, 98345), (221, 82325), (325, 55981), (425, 42809), (445, 40885), (481, 37825), (629, 28925), (925, 19669), (1105, 16465), (1157, 15725), (1513, 12025), (2225, 8177), (2405, 7565), (3145, 5785), (3293, 5525)]